Touch Sensor Device

• US 20110214925A1
• Filed: 03/02/2010
• Published: 09/08/2011
• Est. Priority Date: 03/02/2010
• Status: Abandoned Application

• Current Assignee: FORTREND Taiwan Scientific Corp.
• Original Assignee: FORTREND Taiwan Scientific Corp.
• Inventors: Hsieh, Chao Kuo
• Application Number:
  US12/715,399
• Publication Number:
  US 20110214925A1
• Time in Patent Office: Days
• US Class Current: 178/18.07
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: H03K 17/94 characterised by the way in which the control signals are generated

Abstract

A touch sensor device with increased transmittance, increased sensitivity and decreased thickness is disclosed. The touch sensor device includes a substrate. The substrate, from bottom to top, sequentially includes a bottom conductive layer, a bottom insulation layer, a top conductive layer, an electrode layer, a top insulation layer and a substrate material layer. The bottom conductive layer can shield external electromagnetic interference and act as a ground. The bottom insulation layer is provided with an insulation effect. The top conductive layer is used for sensing a touch operation to generate a sensor signal. The electrode layer includes a plurality of first electrode lines, a barrier layer and a plurality of second electrode lines. The top insulation layer is provided with an effect for preventing electrostatic discharge. The substrate material layer is used for protecting the touch sensor device.

Claims

1. A touch sensor device, comprising:

a substrate having an upper surface for receiving a touch operation, the substrate comprising;

a bottom conductive layer having a shielding effect for shielding external electromagnetic interference and acting as a ground;

a bottom insulation layer disposed on the bottom conductive layer and having an insulation effect;

a top conductive layer disposed on the bottom insulation layer for sensing the touch operation to generate a sensor signal;

an electrode layer disposed on the top conductive layer and including a plurality of first electrode lines, a barrier layer and a plurality of second electrode lines, wherein the first electrode lines and the second electrode lines are used for receiving the sensor signal to determine a position of the touch operation;

a top insulation layer disposed on the electrode layer and provided with an effect for preventing electrostatic discharge; and

a substrate material layer disposed on the top insulation layer for protecting the touch sensor device.

2. The touch sensor device according to claim 1, wherein the first electrode lines and the second electrode lines extend to an edge respectively and converge to form a peripheral region, the peripheral region further converges to form a terminal region for electrically connecting the touch sensor device to other application modules;

the barrier layer is disposed between the first electrode lines and the second electrode lines adjacent to the first electrode lines, and the barrier layer is also disposed at an overlap region where the first electrode lines cross over the second electrode lines to prevent electrical shortcuts, wherein the first electrode lines have a first direction and the second electrode lines have a second direction, and the first direction is different from the second direction.

3. The touch sensor device according to claim 1, wherein the substrate comprises one of glass and polymethylmethacrylate.

4. The touch sensor device according to claim 1, wherein the bottom conductive layer comprises at least one of indium tin oxide and tin dioxide.

5. The touch sensor device according to claim 1, wherein the bottom insulation layer comprises at least one of silicon dioxide and aluminum oxide.

6. The touch sensor device according to claim 1, wherein the top conductive layer comprises indium tin oxide.

7. The touch sensor device according to claim 1, wherein the first electrode lines and the second electrode lines comprise molybdenum and aluminum.

8. The touch sensor device according to claim 1, wherein the barrier layer comprises clear insulation adhesive.

9. The touch sensor device according to claim 1, wherein the top insulation layer comprises silicon dioxide.

10. The touch sensor device according to claim 1, wherein the substrate material layer comprises one of glass and polymethylmethacrylate.

11. The touch sensor device according to claim 1, further comprising a surface insulation layer disposed on the upper surface, wherein the surface insulation layer comprises aluminum oxide.

12. The touch sensor device according to claim 1, further comprising a shielding layer disposed under the top insulation layer and on the electrode layer for shielding the peripheral region.

13. The touch sensor device according to claim 1, further comprising an operation pattern layer disposed under the bottom conductive layer.

14. The touch sensor device according to claim 1, wherein the touch operation is performed by touching the upper surface with a conductive article, the conductive article comprise at least one of fingers and touch pens.